Question

我有一个正在运行的应用程序服务。当用户返回应用程序时，我检查服务是否正在运行，如果确实如此，我尝试连接此服务并显示包含一些数据的片段。但有时我会犯这个错误：

Fatal Exception: java.lang.IllegalStateException: Activity has been destroyed
       at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1433)
       at android.app.BackStackRecord.commitInternal(BackStackRecord.java:687)
       at android.app.BackStackRecord.commitAllowingStateLoss(BackStackRecord.java:667)
       at com.fjuul.fjuul.MainActivity.showGPSFragment(MainActivity.java:712)

尝试连接servise

private void connectService() {
    registerFitnessReceiver();
    sConn = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            if (service != null) {
                callGPSFragment(status, mapWaySelections, activityType);
            }
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    };
    Intent requestIntent = new Intent(MainActivity.this, FitnessRecordingService.class);
    requestIntent.setAction(FitnessRecordingService.GET_FITNESS_RECORD_ACTION);
    bindService(requestIntent, sConn, 0);
}

如果连接完成 - 创建片段并填充数据

private void callGPSFragment() {
        ...
        GPSServicePresenter gpsServicePresenter = new GPSServicePresenter();
        showGPSFragment(gpsServicePresenter);

调用片段

    public void showGPSFragment(GPSServicePresenter gpsServicePresenter) {
     FragmentManager fragmentManager = getFragmentManager();
     FragmentTransaction transaction = fragmentManager.beginTransaction();
     transaction.replace(R.id.body_fragent, gpsServicePresenter);
     Fragment oldFragment = fragmentManager.findFragmentByTag(SplashFragment.tag());
     if (oldFragment != null) {
         transaction.remove(oldFragment);
     }
     transaction.commitAllowingStateLoss();
}

Answer 1

问题是与服务的连接是异步发生的，并且在活动被销毁后有可能会调用onServiceConnected(ComponentName, IBinder)。

为了解决此问题，您可以使用Activity.isDestroyed()功能（和/或isFinishing()，如果您想支持旧版Android）来检查您的活动状态并阻止其后的互动＃39;被摧毁了：

@Override
public void onServiceConnected(ComponentName name, IBinder service) {
    if (service != null && !isDestroyed()) {
        callGPSFragment(status, mapWaySelections, activityType);
    }
}

致命异常：java.lang.IllegalStateException：活动已被销毁

1 个答案: